Redmi Note Zone | How to Fix Google Play Store Can't be Opened - This problem you can found after installing new rom in your device, because there are files missing. But don't worry, I will help you in solving this problem.
I use Redmi Note 4G, just following this step....
Tutorial
1. Download Google Installer.apk.
2. Install.
3. Open Google Installer.
4. Install Google Play Store (in tab google play, download all).
5. Done.
But if google playstore still can not be opened, remove google play store and then install again. Good Luck all bro.
See also How to Get Paid MIUI Themes For Free in Redmi Note.